JAVA 资源管理器

import java.awt.Dimension;
import java.awt.Color;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.BoxLayout;
import javax.swing.tree.TreePath;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
/*
JTree的构造函数:
JTree()
JTree(Hashtable value)
JTree(Object[] value)//只有这个构造函数可以创建多个根结点
JTree(TreeModel newModel)
JTree(TreeNode root)
JTree(TreeNode root, boolean asksAllowsChildren)
JTree(Vector value)

*/
public class JTreeDemo
{
 public static void main (String[] args)
 {

  //构造函数：JTree()
  JTree example1 = new JTree();

  
  //构造函数：JTree(Object[] value)
  Object[] letters= {"a", "b", "c", "d", "e"};
  JTree example2 = new JTree (letters);

  //构造函数：JTree(TreeNode root)(TreeNode空)
  //用空结点创建树
  DefaultMutableTreeNode node1 = new DefaultMutableTreeNode();//定义树结点
  JTree example3 = new JTree (node1);//用此树结点做参数调用 JTree的构造函数创建含有一个根结点的树

  //构造函数：JTree(TreeNode root)(同上,只是TreeNode非空)
  //用一个根结点创建树
  DefaultMutableTreeNode node2 = new DefaultMutableTreeNode("Color");
  JTree example4 = new JTree (node2);//结点不可以颜色,默认为白面黑字
  example4.setBackground (Color.lightGray);

  //构造函数：JTree(TreeNode root, boolean asksAllowsChildren)(同上,只是TreeNode又有不同)
  //使用DefaultMutableTreeNode类先用一个根结点创建树，设置为可添加孩子结点,再添加孩子结点
  DefaultMutableTreeNode color = new DefaultMutableTreeNode("Color", true);
  DefaultMutableTreeNode gray = new DefaultMutableTreeNode ("Gray");
  color.add (gray);
  color.add (new DefaultMutableTreeNode ("Red"));
  gray.add (new DefaultMutableTreeNode ("Lightgray"));
  gray.add (new DefaultMutableTreeNode ("Darkgray"));
  color.add (new DefaultMutableTreeNode ("Green"));
  JTree example5 = new JTree (color);
  
  
  
  
  //构造函数：JTree(TreeNode root)(同上,只是TreeNode非空)
  //通过逐个添加结点创建树
  DefaultMutableTreeNode biology = new DefaultMutableTreeNode ("Biology");
  DefaultMutableTreeNode animal = new DefaultMutableTreeNode ("Animal");
  DefaultMutableTreeNode mammal = new DefaultMutableTreeNode ("Mammal");
  DefaultMutableTreeNode horse = new DefaultMutableTreeNode ("Horse");
  mammal.add (horse);
  animal.add (mammal);
  biology.add (animal);
  JTree example6 = new JTree (biology);
  horse.isLeaf();
  horse.isRoot();
  
  

  //构造函数:JTree(TreeModel newModel)
  //用DefaultMutableTreeNodel类定义一个结点再用这个结点做参数定义一个用DefaultTreeMode
  //创建一个树的模型,再用JTree的构造函数创建一个树
  
  DefaultMutableTreeNode root = new DefaultMutableTreeNode ("Root1");
  DefaultMutableTreeNode child1 = new DefaultMutableTreeNode ("Child1");
  DefaultMutableTreeNode child11 = new DefaultMutableTreeNode ("Child11");
  DefaultMutableTreeNode child111 = new DefaultMutableTreeNode ("Child111");
  root.add (child1); child1.add (child11); child11.add (child111);
  
  
  
  DefaultTreeModel model = new DefaultTreeModel (root);
  
  JTree example7 = new JTree (model);

  JPanel panel = new JPanel();
  panel.setLayout (new BoxLayout (panel, BoxLayout.X_AXIS));
  panel.setPreferredSize (new Dimension (700, 400));
  panel.add (new JScrollPane (example1));//JTree必须放在JScrollPane上
  panel.add (new JScrollPane (example2));
  panel.add (new JScrollPane (example3));
  panel.add (new JScrollPane (example4));
  panel.add (new JScrollPane (example5));
  panel.add (new JScrollPane (example6));
  panel.add (new JScrollPane (example7));
  

  JFrame frame = new JFrame ("JTreeDemo");
  frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
  frame.setContentPane (panel);
  frame.pack();
  frame.show();
 }
}
==========================这一种好简单,很好用======================================
import   org.eclipse.swt.widgets.*;   
    
  public   class   Snippet33   {   
    
  public   static   void   main   (String   []   args)   {   
  Display   display   =   new   Display   ();   
  Shell   shell   =   new   Shell   (display);   
  shell.open   ();   
  DirectoryDialog   dialog   =   new   DirectoryDialog   (shell);   
  dialog.setFilterPath   ("c:\\");   //Windows   specific   
  System.out.println   ("RESULT="   +   dialog.open   ());   
  while   (!shell.isDisposed())   {   
  if   (!display.readAndDispatch   ())   display.sleep   ();   
  }   
  display.dispose   ();   
  }   
    
  }
==================================================================================
楼上的用的是swt包，看见这个没org.eclipse.swt.widgets   
  下面是列表，你自己再改改吧，用的是jdk的jtree写的遍列所有盘文件夹   
    
  import   java.awt.BorderLayout;   
  import   java.awt.Color;   
  import   java.awt.Dimension;   
  import   java.awt.FlowLayout;   
  import   java.awt.event.ActionEvent;   
  import   java.awt.event.ActionListener;   
  import   java.awt.event.MouseAdapter;   
  import   java.awt.event.MouseEvent;   
  import   java.io.File;   
  import   java.io.IOException;   
    
  import   javax.swing.BorderFactory;   
  import   javax.swing.JButton;   
  import   javax.swing.JDialog;   
  import   javax.swing.JLabel;   
  import   javax.swing.JPanel;   
  import   javax.swing.JScrollPane;   
  import   javax.swing.JTree;   
  import   javax.swing.event.TreeExpansionEvent;   
  import   javax.swing.event.TreeExpansionListener;   
  import   javax.swing.filechooser.FileSystemView;   
  import   javax.swing.tree.DefaultMutableTreeNode;   
  import   javax.swing.tree.DefaultTreeModel;   
  import   javax.swing.tree.TreePath;   
  import   javax.swing.tree.TreeSelectionModel;   
    
  public   class   FileTree   extends   JDialog   {   
  private   JLabel   path_   =   new   JLabel("   ");   
  private   JTree   tree_;   
  private   static   String   filepath;   
    
          public   FileTree()   {   
  init();   
          }   
          private   void   init()   {   
  JPanel   labelPanel   =   new   JPanel(new   FlowLayout(FlowLayout.LEFT));   
  labelPanel.setSize(300,   40);   
  JPanel   buttonPanel   =   new   JPanel(new   FlowLayout(FlowLayout.RIGHT));   
  JLabel   current   =   new   JLabel("Current   Selection");   
  labelPanel.setLayout(new   BorderLayout());   
  labelPanel.add(current,   BorderLayout.NORTH);   
  labelPanel.add(path_,   BorderLayout.SOUTH);   
    
  File[]   roots   =   (new   PFileSystemView()).getRoots();   
  FileNode   nod   =   new   FileNode   (roots[0]);   
  nod.explore();   
  tree_   =   new   JTree(new   DefaultTreeModel(nod));   
  tree_.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);     
    
  JScrollPane   sp   =   new   JScrollPane(tree_);   
  sp.setBorder(BorderFactory.createEtchedBorder(Color.white,   new   Color(148,   145,   140)));   
    
  labelPanel.setBorder(BorderFactory.createEmptyBorder(0,   19,   0,   0));   
  JButton   buttonOK   =   new   JButton("OK");   
  buttonOK.setPreferredSize(new   Dimension(70,   25));   
  JButton   buttonCanel   =   new   JButton("Canel");   
  buttonCanel.setPreferredSize(new   Dimension(70,   25));   
  buttonPanel.add(buttonOK);   
  buttonPanel.add(buttonCanel);   
            
  //canel   action   
  buttonCanel.addActionListener(new   ActionListener()   {   
  public   void   actionPerformed(ActionEvent   e)   {   
  System.exit(0);   
  }   
  });   
  //ok   action   
  buttonOK.addActionListener(new   ActionListener()   {   
  public   void   actionPerformed(ActionEvent   e)   {   
  System.err.println(filepath);       
  }   
  });   
  tree_.setShowsRootHandles(true);   
  tree_.addTreeExpansionListener(new   TreeExpansionListener()   {   
  public   void   treeCollapsed(TreeExpansionEvent   e)   {   
    
  }   
  public   void   treeExpanded   (TreeExpansionEvent   e)   {   
  TreePath   path   =   e.getPath();   
  FileNode   node   =   (FileNode)path.getLastPathComponent();   
  if   (!node.isExplored())   {   
  DefaultTreeModel   model   =   (   
  (DefaultTreeModel)   tree_.getModel());   
  node.explore();   
  model.nodeStructureChanged(node);   
  }   
  }                                 
  });   
  tree_.addMouseListener(new   MouseAdapter()   {   
  public   void   mousePressed(MouseEvent   e)   {   
  JTree   tree   =   (JTree)e.getSource();   
  int   row   =   tree.getRowForLocation(e.getX(),   e.getY());   
  if   (row   ==   -1)   {   
  return;   
  }   
  TreePath   path   =   tree.getPathForRow(row);   
  if   (path   ==   null)   {   
  return;   
  }   
  FileNode   node   =   (FileNode)path.getLastPathComponent();   
  if   (node   ==   null)   {   
  return;   
  }   
  filepath   =   node.getString();   
  path_.setText(filepath);   
  }   
  });   
  getContentPane().add(sp,   BorderLayout.CENTER);   
  getContentPane().add(labelPanel,   BorderLayout.NORTH);   
  getContentPane().add(buttonPanel,   BorderLayout.SOUTH);   
  setSize(350,   400);   
  this.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);   
  this.setTitle("File   Tree");   
          }   
  class   FileNode   extends   DefaultMutableTreeNode   {   
  private   boolean   explored_   =   false;   
    
  public   FileNode(File   file)   {   
  setUserObject   (file);   
  }   
  public   boolean   getAllowChildren()   {   
  return   isDirectory();   
  }   
  public   boolean   isLeaf()   {   
  return   !isDirectory();   
  }   
    
  public   File   getFile()   {   
  return   (File)getUserObject();   
  }   
  public   boolean   isExplored()   {   
  return   explored_;   
  }   
  public   boolean   isDirectory()   {   
  File   file   =   getFile();   
  return   file.isDirectory();   
  }   
  public   String   toString()   {   
  File   file   =   getFile   ();   
  String   filename   =   file.toString();   
  int   index   =   filename.lastIndexOf("\\");   
  return   (index   !=   -1   &&   index   !=   filename.length()   -   1)   ?   
  filename.substring(index   +   1)   :   
  filename;   
  }   
  public   String   getString()   {   
  File   file   =   getFile   ();   
  String   filename   =   file.getAbsolutePath();   
  return   filename;   
  }   
  public   void   explore()   {   
  if   (!isDirectory())   {   
  return;   
  }   
  if   (!isExplored())   {   
  File   file   =   getFile   ();   
  File   []   children   =   file.listFiles();   
  for   (int   i   =   0;   i   <   children.length;   ++i)   {   
  if   (children[i].isDirectory())   {   
  add(new   FileNode   (children[i]));   
  }   
  }     
  explored_   =   true;   
  }   
  }     
  }   
    
  class   PFileSystemView   extends   FileSystemView   {   
  public   File   createNewFolder(File   containingDir)   throws   IOException   {   
  return   null;   
  }   
  }   
  public   static   void   main(String[]   args)   {   
          (new   FileTree()).show(true);   
  }   

本文转自kenty博客园博客，原文链接http://www.cnblogs.com/kentyshang/archive/2007/08/14/855565.html如需转载请自行联系原作者

kenty